First slide

Metabolism of Nitrogen

Question

The product(s) of reaction catalyzed by nitrogenase in root nodules of leguminous plants is/are :

Easy

A

Nitrate alone
B

Ammonia and oxygen
C

Ammonia and hydrogen
D

Ammonia alone

Solution

The products of reaction catalyzed by nitrogenase in root nodules of leguminous plants are two molecules of ammonia and hydrogen.
$N_{2} + 8 e^{-} + 8 H^{+} + 16 ATP \overset{Nitrogenase}{\to} 2 {NH}_{3} + H_{2} + 16 ADP + 16 Pi$
The enzyme nitrogenase is highly sensitive to oxygen and if oxygen would be released as a byproduct the enzyme nitrogenase would become non-operational.

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